Sight for guns.



No. 723,747; PATENTBD MAR. 24., 1903.. J! SMITH.

SIGHT'FOB, GUNS.

APPLIOATION FILED SEPT; 26. 1902.

H0 MODEL.

witnesses Inventor W 1% M fii /r lm,

flttorneya UNTTED STATES PATENT OFFICE.

JOHN SMITH, OF NATIONA, PENNSYLVANIA.

SIGHT FOR GUNS.

SPECIFICATION forming part of Letters Patent No. 723,747, dated March 24, 1903. Application filed September 26, 1902. Serial No. 124,952. (No modalz) To (0% whom it may concern.-

Be it known that I, JOHN SMITH, a resident of Nationa, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in'Sights for Guns;-

sight for this purpose whereby the gun canbe aimed on small objects with more accuracy than with the sights now in use and whereby it can be accurately determined when the gun is properly aimed.

In the accompanying drawings, Figure 1 is an end View of a gun-barrel, showing the sight in position. Fig. 2 is a side view of the same. Fig. 3 is a front elevation of the sight, on an enlarged scale, showing. the effect which the object aimed at will produce on the sight. Figeisavertical longitudinal section through the sight, on an enlarged scale, showing the construction thereof; and Fig. 5 is a similar view illustrating the principle thereof.

My invention is particularly adapted for the muzzle-sight of all kinds of firearms,such as shotguns, rifles, revolvers, and even heavy ordnance. In aiming firearms at minute objects it is difficult to tell just when the object is accurately covered, for the reason that the sights are usually solid and obscure or hide the object, or if they are not solid a small object cannot be readily detected by the unaided eye, and especially in the case of persons of advanced age or impaired eyesight. I

have discovered that certain formations of glass will make the object aimed at appear larger than it really is and will not totally obscure or hide the same, so that if the gun is aimed on the object it can be accurately determined just when it is in exact position.

In the drawings, 1 indicates the muzzle of any ordinary gun. 2 is the sight-support, secured to said muzzle. Said support may be of any desired shape or construction and forms no part of my invention. In this support is secured the sight 3. The latter comprises a piece of glass having thereina point 40f obscured transparency and surrounded by curved layers or strata of glass 5, which give a lens-like formation about the point 4. This ing a minute spot or dot either opaque or of obscure transparency and wherein the. glass surrounding the same has a curved or lenslike formation serves excellently for a gunsight. This may possibly be explained as follows: In Fig. 5 at 7 is represented the object at which aim is to be taken, the observers eye being at the point 8. When the opaque point 4 is brought directly in line with the object 7, it obscures the latter, so that ordinarily it could not be seen. The rays of light from said object '7, however, when they meet the curved or lens-like strata 5 are refracted, as indicated at 9, so that the object will appear on the sight having a diameter equal to the distance between the lines 10 and 11, thus appearing much larger than would ordinarily be the case. This is agreat aid to the naked eye. Said object, however, will not appear as a solid mass, as the opaque spot 4E 'will obscure or conceal the center thereof; but said object will appear as a circle 12, (indicated in Fig. 3,) surrounding the opaque spot 4. When this circle is perfect or complete, the user will know that he has the gun accurately aimed at the object.

The point 4 instead ofbeing a hard unfused opaque mass may be an ordinary airbubble, such as found in 'ordinarygl'ass. This does not give an opaque spot, but neve'rtheless gives a spot of obscured transparency, and the glass surrounding said bubble has practically the same lens-like formation, as shown in the drawings, and produces the same effect. For ordinary firearms the spot 4 must be quite minute not more than four one-hund'redths of an inch in diameter.

- All ordinary window-glass contains many pieces having the necessary formationformy gun-sight, so that it is not necessary to especially make the same, although this could be done, if necessary. The sight is therefore very cheap,and it has been abundantly tested and found to be exceedingly efficient.

What I claim as my invention, and desire to secure by Letters Patent, is-- 1. A sight for guns comprising a piece of glass having a point of obscured transparency in the body thereof, and a lens-like formation enveloping said point.

2. A sight for guns comprising a piece of glass containing a minute granule or bubble embedded therein, thus producing a point of obscure transparency, and alens-like forma- 15 tion enveloping the same.

3. A sight for guns comprising a piece of glass having a minute granule of solid opaque material embedded therein, thus producing a point of obscured transparency, and havins, lens-like strata enveloping said granule.

In testimony whereof I, the said JOHN SMITH, have hereunto set my hand.

JOHN SMITH.

Witnesses:

ROBERT C. TOTTEN, R0131. D. TOTTEN. 

